Fan connector only working if half inserted?

Greetings,

My son is 12 and is transitioning from pi/python to nano/c++ for a few projects he’s working on. Today my secretarial role brings me to query you concerning an odd (for us) phenomena: you half insert the fan and it works. You completely insert it and it fails.

The connector on the motherboard looks all good: no bent pin everything looks straight.

You can see the connector here: https://imgur.com/a/h7y8ayX

Thank you for sharing your thoughts.

Antoine

PS: I myself have some programming experience and am learning with him. :)

Hi, only first three seconds of the video can be viewed.

Generally if only half inserting fan works, it might be a contact issue between the fan and fan connector.